Tube connection.



PATBNTED FEB. 17,v 1903.

J. H. ROSENTHAL. TUBE CONNECTION.

` PPLIOATION FILED MAR. 6. 1902.

1sr`oA MODEL.

tube-plates of such apparatus to avoid leak-A UNITED STATES PATENT OFFICE.

JAMES H. ROSENTHAL, OF LONDON, ENGLAND, ASSIGNOR TO THE BABOOOK I da WILCOXLCOMPANY, OF NEW YORKfN. Y.

T UBE CONNECTION.

.srncrrrcnron fprmingpartofretrs retener-ro. veoaauafea' February 17, 1903.

Application lerl March 6, 1902. Serial No. 96.944. (No model) To all whom it may concern: i

Be it known that I, JAMESH. ROSENTHAL, a subject of the King of Great Britain, residing at Oriel House, Farringdon street, London, England, have invented certain new and useful Improvements in Tube Connections, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention, which relates to ferruled joints for the tubes of surface condensers or like apparatus, has forits object theprovision of improved means for fixing the tubes in the age at the ferruled ends and to permit of the ready withdrawal of the ferrules and of the tubes without risk of injury to the latter.

According to the usual practice the tubes of condensers are secured in the tube-plates by means of screwed ferrules and cotton packing or by wooden ferrules, which swell by the action of the water, and leakage of salt water takes place through the ferrules or their packing, which cannot be kept tight owing to vibration of the engines and from other causes. This objection is overcome under my invention by expanding the tubes into and with metal ferrules in oriiices in: the tube-plates, from which the ferrules are adapted to be withdrawn when required by means of a socketed draw-bolt and bridge-piece withoutfin` juring the tubes, which may thus be used over and overagain, and by givingthe tubes a slight camber, which allows them 'to bend or yield to take up the difference of eXpansion consequent on steam being von one side of the tubes and the cooling-water on the other side.

The invention is illustrated by the accompanying drawings, in which- Figure 1 is a section of the tube-plates of a surface condenser or feed-water heater, showing a single tube and one form of the ferrule and draw-bolt for withdrawing it. Fig. 2 is a similar View showingPl a modied construction, and Fig. 3 is an end elevation showing the bridge for the draw-bolt.

As shown by the drawings, each tube A of the condenser or like apparatus is secured at its ends in the tube-plates B by expanding said ends within and with ferrules C, fitting oritices in the tube-plates,which ferrules have a short plain tubular portion for the eXpansion of the tube ends, insuring that tight joints shall be formed between the tube ends 5 5 and the ferrules and between the latter and the tube-plates, so that leakage may not take place. The series of tubes A have a slight camber, as shown at Figs. 1 and 2,which allows equal expansion'. Each fer-rule is formed, as shown at Fig. 1, with a plain tubular portion vof their further bending or yielding under un- 6o nally-screw-threaded portion C', or, as shown 6 5 at Fig. 2, with an internally-screw-threaded portion C2, the screw-thread in each case being toward the outer end of the ferrule to per- ,mit of its engagement with a draw-bolt for withdrawing the ferrule when. the tubes A 7o are to be removed for cleaning or renewal. When the screw-thread on the ferrule is an external one, the draw-bolt D has' a correspondingly internally-screw-threaded socketl D', and when the ferrule has an internal 75 screw-thread the draw-bolt employed has an externally-screw-threaded end D2. In yeach case the stem of the draw-bolt D is carried through a bridge-piece E and is iitted outside with a nut F, by turning which the bolt is 8o drawn out Aand withdraws the ferrule on or into which it has been screwed. In the eX- ample shown at Fig. 1 theend of the ferrule projects from the tube-plate, and in the other example it is or may ne flush therewith. will be seen that the ferrule into which the end of the tube is inserted, whether con structed with the internal or the externall threaded portion with which-the drawing-tool D is adapted to engage, is provided with in- 9o terlockin g projections arranged to be engaged by a pulling or drawing tool and disposed Ytransversely to the axis of the ferrule or the tube with which it engages and that in this respect it differs from thoseforms of ferrules heretofore used and adapted to be screwed into the tube-plate and which are provided with longitudinally-disposed projections arranged to be engaged by a wrench or turningtool.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is- 1. The combination with a tube and tubeplate, of a ferrule into which the end of the tube is tted having an exterior surface adapted to tightly fit an aperture in the, tube-plate, and a portion provided with transversely-disposed interlocking projections adapted to be engaged by a pulling or drawing tool arranged to withdraw the ferrule from the plate and the tube without injury to these parts, substantially as set forth.

2. The combination with a tube anda tubeplate, of a ferrule having a plain interior surface into which the end of the tube is fitted, and a plain exterior surface arranged to fit an aperture in the tube-plate, the said interior and exterior plain surfaces being arranged opposite to each other, and the ferrule being also provided with projections arranged to be engaged by a tool adapted to withdraw the ferrule bodily from the plate and the tube, substantially as set forth.

3. The combination witha tube and a tubeplate, of a ferrnle having itsinner end with a plain interior surface into which the tube is adapted to be expanded, and with a plain exterior surface adapted to t an aperture in t-he plate, and having its outer portion provided with a screw-thread adapted to be engaged by a tool for withdrawing the ferrule bodily from the tube and plate, substantially as set forth.

In testimony whereof I affix my signature in presence of two Witnesses.

JAMES I'I. ROSENTHAL.

Witnesses:

H. P. SMITH, J. B. SIRETT. 

